Components_of_NOVAC_scanner_systems_3_1.pdf
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- Attached to
- Scanning DOAS Federal contract opportunity
- Solicitation number
- 140G0326Q0113
About this file
This document is a technical specification sheet for individual components of NOVAC scanner systems used for atmospheric measurement applications.
The specification details four primary components: (1) High latitude scanner with cone geometry, a plastic DOAS scanner designed for harsh, high-latitude environments featuring a fused-silica tube to eliminate susceptible external moving parts and heated by excess stepper motor heat; (2) Metal pole holder for mounting the scanner on steel pipe frames or masts, with bolts for attachment to both the scanner mounting component and the supporting structure; (3) Motor cable measuring 6 meters in length with DB9 adapter, featuring special connectors designed to pass through narrow openings and conduit, connecting the scanner stepper motor to the NOVAC instrument typically installed at the mast base; and (4) Cylindrical quartz window composed of cylindrical lenses that enable updated scanners to collect scattered UV radiation across a wider range of angles than previously possible, particularly advantageous for wind speed measurements utilizing the dual beam capabilities of the scanner systems. The high latitude scanner version is disassembled into a scanner mounting component, motor mounting component, and protective hood, delivered with four custom-made bolts and two fiber optics cable mounting holes for dual beam measurements.
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Text version
Specifications of individual components of NOVAC scanner systems
1. High latitude scanner, cone geometry
These are DOAS scanners made of plastic. They can be disassembled into a scanner mounting component, a motor mounting component and a protective hood. The hood covers the optical mirror and scanner motor. They are delivered with four custom-made bolts that connect the individual components of the scanner. Two holes are provided for mounting two fiber optics cables – thus allowing dual beam measurements. The high latitude version of the scanners are modified for use in high-latitude environments. In contrast to the standard scanners, these use a fused-silica tube through which the scanning mirror or prism collects scattered UV light. This eliminates the need for external moving parts which would otherwise be susceptible to rime ice.
The fused silica tube is heated by excess heat from the stepper motor.
2. Metal pole holder for mounting scanner on mast
This component is used to mount the scanner on a steel pipe frame or mast. One side fits within the scanner mounting component. Bolts are provided to attach the two. The other side of the pole holder can be clamped or bolted to a steel frame or mast.
3. Motor cable, 6 m long, with DB9 adapter
These cables are used to connect the scanner stepper motor with the NOVAC instrument typically installed at the base of the scanner mast. The motor cables have special connectors that allow them to be passed through narrow openings and conduit within the scanner and instrument enclosures. The short adapter breaks out one end of the cable to a DB9 connector for attachment to the data acquisition system.
4. Cylindrical quartz window
These cylindrical lenses allow the updated scanners to collect scattered UV radiation from a wider range of angles than previously possible. The new design is advantageous for wind speed measurements using the dual beam capabilities of the scanner systems.
File details come from the government source that posted it. Updated .